[R] Installing packages into updated R

[Henric Nilsson]

On Ti, 2005-12-20, 16:11, Michael H. Prager skrev:

> A minor inconvenience in updating an R installation is remembering which
> packages were installed previously.  Has anyone written a script to
> inspect a previous installation, then get & install the same packages
> into the new installation?

If the previous installation is still alive, fire it up and

pS <- packageStatus()
pkgs <- pS$inst$Package[!pS$inst$Priority %in% c("base", "recommended")]
save(pkgs, file = "foo")

In the new installation,

load("foo")
install.packages(pkgs)


HTH
Henric